HP Integrity NonStop J-Series - Manual (Page 247)

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©Copyright 1996 Rogue Wave Software
The Tools.h++ Error Model
The following table categorizes and describes errors in the Tools.h++ error model. You can use
the table as a quick overview, and return to it as a reference.
Error Type: Internal External
Non-recoverable Recoverable
Cause: Faulty logic or coding
in the program Faulty logic or
coding in the
program Events beyond the
scope of the program
Examples: Bounds error; inserting
a null pointer into a
collection Bounds error in a
linked list; attempt to
use an invalid date Attempt to write a bad
date, or to invert a
singular matrix; stream
write error; out of
memory
Predictable? Yes Yes No
Cost to detect: High Low Low
Level of
abstraction: Low Low High
Where
detected: Debug version of
library Debug and
production version of
library Debug and production
version of library
Response: No recovery mechanism Throw an exception
inheriting from
RWInternalErr
Throw an exception
inheriting from
RWExternalErr, or
provide test for object
validity